Start learning 50% faster. Sign in now
Given, (P + Q)’s 1 day work = 1/30 And (Q + R)’s 1 day work = 1/20 Also, P’s 5 days w + Q’s 15 days w + R’s 18 days w = 1 work ⇒P’s 5 days w + Q’s 5 days w + Q’s 10 days w + R’s 10 day w + R’s 8 day w = 1 work ⇒ (P + Q)’s 5 days w + (Q+ R)’s 10 days w + R’s 8 days work = 1 work ⇒ (5/30) + (10/20) + R’s 8 days work = 1 work ⇒ (1/6) + (1/2) + R’s 8 days work = 1 work ⇒R’s 8 days work = 1 – ( 1/6 + 1/2 ) work ⇒R’s 8 days work = 1 – ((1+3)/6) = 1 - (4/6) = 1 - (2/3) R’s 8 days work = 1/3 work R will complete the work in 8 × 3 = 24 days Alternate Method: P+Q Q+R Time 30 20 Let work = LCM = 60 units Eff 2 : 3 P`xx` 5+Q`xx` 15+R`xx` 18 = 60 P`xx` 5+Q`xx` 5+Q`xx` 10+R`xx` 10+R`xx` 8=60 (P+Q)`xx` 5 + (Q+R)`xx` 10+8R = 60 (2)`xx` 5 + (3)`xx` 10+8R = 60
If ‘P’ means (÷), ‘Q’ means (×), ‘R’ means (+), and ‘S’ means (-), then what is the value of the expression:
900 P 15 R 26 Q 5 ...
If A denote ÷, B denotes x, C denotes + and D denotes -, what is the value of the given expression?
32 B 40 A 8 C 10 D 12
Which two digits and signs can be interchanged so as to balance the given equation?
406- 102 + 128 X 5 ÷ 58 = 545
Select the correct combination of mathematical signs to sequentially replace the * signs and to balance the given equation.
168 * 8 * 7 * 34 * 94 = 256
Which two signs should be interchanged to make the following equation correct?
8 × 12 ÷ 3 – 6 = 40 + 2
If '+' means '×', '×' means '-', '÷' means '+', and '-' means '÷', select the number from the given options that can replace the question mark '?' i...
If “+” means “minus”, “×” means “divided by”, “÷” means “plus”, and “-“ means then “multiplied by”
250 × 10 �...
Out of the total number of players, 100/3 % are in hotel X and the remaining are in hotel Y. If 20 players from hotel Y are shifted to hotel X, then the...