Question
The speed of a bike increases by 5 km/hr after every 1
hour. If the distance travelled by the bike in 1st hour is 20 km, the find the total distance travelled by the bike in 14 hours.Solution
Since, the speed of the bike increases by 5 km/hr after every 1 hour, therefore the bike will travel 5 km extra after every 1 hour. Therefore, distance travelled by the bike in 1st hour = 20 km Distance travelled by the bike in 2nd hour = 20 + 5 = 25 km Distance travelled by the bike in 3rd hour = 25 + 5 = 30 km This form an AP i.e. 20, 25, 30………distance travelled in 14th hour Therefore, total distance travelled by the bike in 14 hours = sum of the AP Distance travelled in 14 hours = (n/2){2a + (n – 1)d} Where n = number of terms = 14, a = 1st term = 20 and d = common difference = 14 Therefore, distance travelled in 14 hours = (14/2){2 × 20 + (14 – 1) × 5} = (14/2)(40 + 65) = 735 km
Two Bikes start from the opposite places of a highway 250km apart. First Bike A runs for 45km and takes a right turn and then runs 25km. It then turns l...
G @ H % I # J @ K, then in which direction is K with respect to H?
O is in with direction with respect to G and what is the distance between O and G is?
If X is 5 m south of P and Z is 14 m west of X, then what is the distance between Z and T?
Rohit travels 25m towards the east and then turns 90° to his right and travels another 4 m. Finally, he turns right and covers 25m. How far is he now f...
Read the directions carefully and answer the questions based on them.
L is to the east of R. M is 5m to the south of L. N is 5m to the south of...
Sonam is walking facing south, then turns 90° in clockwise direction and then turns 90° in clockwise direction again. In which direction is she finall...
Rohit eats more than Ankit, Shubham eats less than Prabhu but more than Ankit. Rohit eats less than Shubham. Who eats the most in the group?
If L is 11m east of F then L is in which direction of H?
If Y # & M then Y is in with direction with respect to L ?